CN110780131A - Monitoring system for recording start-up and shut-down states of refrigerator - Google Patents
Monitoring system for recording start-up and shut-down states of refrigerator Download PDFInfo
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- CN110780131A CN110780131A CN201911007104.4A CN201911007104A CN110780131A CN 110780131 A CN110780131 A CN 110780131A CN 201911007104 A CN201911007104 A CN 201911007104A CN 110780131 A CN110780131 A CN 110780131A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/002—Thermal testing
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The embodiment of the invention discloses a monitoring system for recording the on-off state of a refrigerator, which comprises a parameter sampling unit, a parameter storage unit and a parameter display unit, wherein the parameter sampling unit is used for collecting working parameters of a refrigerator refrigeration device after maintenance in the on-off state; the single chip processor receives the detection data of the storage parameter sampling unit, processes the detection data and judges whether the refrigerator is in a normal working state or not; the display circuit is used for displaying the processing result of the working parameters of the refrigerator; the prompt tone circuit is used for prompting the parameter acquisition action during starting and stopping; the key input circuit is used for setting the acquisition time value of the parameter sampling unit and checking the specific result of the parameter sampling unit; according to the scheme, the data of each detection time point can be automatically stored, and the monitoring data are processed in real time, so that manual calculation processing is not needed, the accuracy of start-up and shutdown monitoring is improved, the time is saved, the working efficiency is improved, and the maintenance monitoring result is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of refrigerator quality inspection, in particular to a monitoring system for recording the on-off state of a refrigerator.
Background
Under the normal refrigeration condition, the refrigerator can be automatically stopped when reaching a certain temperature after a period of time. The on-off time of the compressor is related to the seasonal environment temperature and the quantity of food placed in the refrigerator. Thirdly, the refrigerator is related to the brand and the model of the refrigerator, and the refrigerators with different brands or models are different.
In spring and autumn, the proportion of the on-off time of a refrigerator compressor is generally 10: between 40 minutes, i.e. the compressor is operating for about 10 minutes, and the down time is about 40 minutes. The premise is that the temperature of a freezing chamber of the refrigerator is about 18 ℃ below zero, and the temperature of a refrigerating chamber of the refrigerator is 5-8 ℃.
Certainly, if the refrigeration start-up and shutdown functions of the refrigerator are damaged and maintained, after the maintenance work of the refrigeration equipment is finished, the worker is required to observe the information of the single time of the start-up and shutdown of the refrigeration equipment, the time ratio of the start-up state to the shutdown state, the voltage, the current, the temperature and the like of the refrigeration equipment, a large amount of time is consumed for verification because a large amount of experimental data is needed for comparison, whether the maintenance is successful or not is judged purely by the experience of the worker, accurate data record support is not provided, the trust of a user is influenced, and meanwhile, the normal working efficiency of the worker is reduced.
Disclosure of Invention
Therefore, the embodiment of the invention provides a monitoring system for recording the start-up and shut-down states of a refrigerator, and aims to solve the problems that time is wasted, accurate data recording is not available, and the maintenance and verification effects are slow due to manual observation of the start-up and shut-down times in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a monitoring system for recording the on-off state of a refrigerator according to an embodiment of the present invention comprises
The parameter sampling unit is used for collecting working parameters of the maintained refrigerator refrigeration equipment in a starting and stopping state;
the single chip processor receives the detection data of the storage parameter sampling unit, processes the detection data and judges whether the refrigerator is in a normal working state or not;
the display circuit is used for displaying the processing result of the working parameters of the refrigerator;
the prompt tone circuit is used for prompting the parameter acquisition action during starting and stopping;
and the key input circuit is used for setting the acquisition time value of the parameter sampling unit and checking the specific result of the parameter sampling unit.
Furthermore, the parameter sampling unit comprises a voltage sampling unit for collecting the working voltage of the refrigerator refrigeration equipment, a current sampling unit for collecting the working current of the refrigerator refrigeration equipment and a temperature collecting unit for collecting the storage temperature of the refrigerator in real time.
Further, the specific steps of the single chip processor for processing the information collected by the voltage sampling unit and the current sampling unit are as follows:
setting sampling time, respectively acquiring working voltage and working current of the refrigerator refrigeration equipment in real time by using a voltage sampling unit and a current sampling unit, and storing acquired voltage and current parameters in real time by a singlechip processor;
the single chip processor processes data, respectively creates a time-voltage rectangular coordinate system and a time-current rectangular coordinate system, correspondingly integrates a working voltage value and acquisition time in the time-voltage rectangular coordinate system, and correspondingly integrates a working current value and acquisition time in the time-current rectangular coordinate system;
the turning points in the time-voltage rectangular coordinate system and the time-current rectangular coordinate system are counted, adjacent starting states and stopping states are combined into a group, and the time ratio of each group of starting states and stopping states in the acquisition time is calculated;
deducing the stability of the startup and shutdown conversion according to the times of the startup and shutdown of the multiple groups and the counted ratio of the startup and shutdown after being respectively accumulated;
and counting the startup and shutdown time lengths between the two turning points in the set time, and respectively comparing a plurality of startup time length changes and shutdown time length changes.
Furthermore, the temperature acquisition unit is mainly used for acquiring the temperature of the storage chamber of the refrigerator in real time, and the specific steps of the single chip processor for processing the information acquired by the temperature acquisition unit are as follows:
setting a temperature threshold value of the storage chamber, acquiring the temperature of the storage chamber in the refrigerator by using a temperature acquisition unit, and storing the acquired temperature parameters in real time by using a single chip processor;
respectively creating a time-temperature rectangular coordinate system in a single chip processor, and correspondingly integrating the refrigerating temperature, the acquisition time and the temperature threshold value in the time-temperature rectangular coordinate system;
counting the change turning points of the refrigeration temperature, collecting the time point corresponding to each change turning point, and calculating the average temperature between the two turning points;
comparing the time points of the temperature change turning point, the current change turning point and the voltage change turning point, and calculating whether the turning point time of the three parameters is consistent;
and calculating the difference between the maximum temperature and the minimum temperature of the storage chamber and the temperature threshold respectively, and providing a parameter for adjusting the ratio of the startup and shutdown state time in an auxiliary mode.
Further, the voltage and current value of the refrigerator refrigeration equipment in the starting state is far larger than zero, and the voltage and current value of the refrigerator refrigeration equipment in the stopping state is equal to zero or slightly larger than zero.
Further, the specific formula for calculating the average temperature between the two turning points is:
where kp (i) is the voltage value or the current value detected at regular time, and n is the sampling times in the two turning point times.
Further, the difference between the maximum and minimum storage compartment temperatures and the temperature threshold is ± 1 ℃.
Further, when calculating whether the three parameter triggering times of the temperature change turning point, the current change turning point and the voltage change turning point are consistent, taking the time corresponding to the current change turning point as a standard value, and comparing the time of the temperature change turning point and the time corresponding to the voltage change turning point with the standard value.
Furthermore, the current sampling unit is also connected with a current amplification filter circuit, the output end of the current amplification filter circuit is connected with the input pin of the single chip processor, and the output ends of the voltage sampling unit and the temperature acquisition unit are also connected with the input pin of the single chip processor.
Furthermore, the power supply module is connected with a power pin of the single chip processor through the circuit conversion unit and also provides power for the prompt tone circuit.
The embodiment of the invention has the following advantages:
(1) according to the invention, through the single chip microcomputer programming and information acquisition means, the data of each detection time point can be automatically stored, and meanwhile, the monitoring data is processed in real time, so that the respective time distribution conditions of starting and stopping of the refrigerator refrigeration equipment and the duty ratio conditions of starting and stopping are automatically obtained, thereby avoiding manual calculation processing, improving the accuracy of starting and stopping monitoring, saving time, improving the working efficiency and improving the maintenance monitoring result;
(2) the invention compares the temperature change turning point with the normal time, assists in analyzing the reason of the refrigerator fault, and can help the staff to determine whether the refrigerator is successfully maintained and adjust the maintenance scheme, so that the system not only can solve the problem of the refrigerator, but also provides a reasonable maintenance scheme, and plays a role of an intelligent auxiliary tool.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a block diagram of a monitoring system according to the present invention;
FIG. 2 is a circuit diagram of a monitoring system according to the present invention;
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1 and 2, the present invention provides a monitoring system for recording the on-off state of a refrigerator, which can be used not only in the refrigerator or freezer home appliance maintenance industry, but also in the refrigerator and freezer manufacturing industry.
In order to solve the problems, the parameters of equipment such as a refrigerator and an ice chest can be intelligently and visually acquired, monitored and recorded by means of single chip microcomputer programming and information acquisition, time is saved, working efficiency is improved, maintenance monitoring precision is improved, and monitoring results are improved.
The intelligent power supply device comprises a single chip processor, a parameter sampling unit and a key input circuit which are connected with the input end of the single chip processor, a display circuit and a prompt tone circuit which are connected with the output end of the single chip processor, and further comprises a power supply module, wherein the power supply module is connected with a power pin of the single chip processor through a circuit conversion unit.
The parameter sampling unit is used for collecting working parameters of the refrigerator refrigeration equipment in an on-off state after maintenance, the parameter sampling unit specifically comprises a voltage sampling unit, a current sampling unit and a temperature collecting unit, the voltage sampling unit is used for collecting working voltage of the refrigerator refrigeration equipment, the current sampling unit is used for collecting working current of the refrigerator refrigeration equipment, and the temperature collecting unit is used for collecting storage temperature of the refrigerator in real time.
The current sampling unit is also connected with a current amplification filter circuit, the output end of the current amplification filter circuit is connected with the input pin of the single chip processor, and the output ends of the voltage sampling unit and the temperature acquisition unit are also connected with the input pin of the single chip processor.
The single chip processor is used for receiving the detection data of the storage parameter sampling unit, processing the detection data and judging whether the refrigerator is in a normal working state.
And the display circuit is used for displaying the processing result of the working parameters of the refrigerator.
The prompt tone circuit is used for reminding the parameter acquisition action during starting and stopping, and the power supply module also provides power for the prompt tone circuit.
And the key input circuit is used for setting the acquisition time value of the parameter sampling unit and checking the specific result of the parameter sampling unit.
According to the above, the parameter sampling unit sends the collected data to the single chip processor, the single chip processor performs centralized storage and calculation processing on the data according to programming to form an intelligent monitoring system without manual calculation statistics, and the specific steps of the single chip processor for processing the data of the parameter sampling unit are as follows:
t1, setting the sampling time according to different occasions through the key input circuit, wherein the sampling time can be set to different time lengths according to requirements.
T2, respectively collecting the working voltage and the working current of the refrigerator refrigeration equipment in real time by using the voltage sampling unit and the current sampling unit, transmitting the working voltage and the working current data to the single chip processor, and storing the collected voltage and current parameters in real time by using a memory externally connected or internally arranged with the single chip processor.
And the T3 and the singlechip processor process the data, respectively create a time-voltage rectangular coordinate system and a time-current rectangular coordinate system, correspondingly integrate the working voltage value and the acquisition time in the time-voltage rectangular coordinate system, and correspondingly integrate the working current value and the acquisition time in the time-current rectangular coordinate system.
The voltage sampling unit and the current sampling unit regularly acquire primary voltage and current values which can be 30s or 1min, specific single sampling time is unequal, the sampling time can be set according to requirements, the acquired voltage and current values are respectively marked in a time-voltage rectangular coordinate system and a time-current rectangular coordinate system, and a current change curve are generated.
And T4, calculating turning points in the time-voltage rectangular coordinate system and the time-current rectangular coordinate system, setting adjacent starting states and stopping states as a group, calculating the time ratio of the starting states and the stopping states in the acquisition time according to the times of starting and stopping the groups, and deducing the stability of starting and stopping conversion.
The voltage and current values of the refrigerator refrigeration equipment in the starting state are far larger than zero, the voltage value of the refrigerator refrigeration equipment in the stopping state is equal to zero, but the current value is generally larger than zero, and the specific reason is that: even if the refrigerator stops working and the voltage is zero, other circuits in the refrigerator work, such as normal working of a refrigerating chamber illuminating lamp and a winter compensation heater, so that when the current is detected, the current value is larger than zero even if the refrigerator refrigerating equipment is in a shutdown state, and the threshold power is set to be slightly larger than the power of the refrigerating chamber illuminating lamp and the winter compensation heater, so that the current startup and shutdown state of the refrigerating equipment can be assisted to be judged.
For example, the power of the refrigerating chamber illuminating lamp and the winter compensation heater working simultaneously does not exceed 23W, the threshold power is set to be 30W, when the threshold power is less than 30W, the monitoring state is determined to be the stop state, and the detected current value is less than the current value of the refrigerator refrigeration equipment in the start state.
Therefore, the change of the current value and the change of the voltage value can be obviously distinguished from the change curve of the current and voltage values, turning points in the change curve of the current and the change curve of the current are found, starting time which is larger than zero and stopping time which is equal to zero in each group range are counted, the ratio of the starting time to the stopping time is calculated, and whether the starting time and the stopping time of the refrigerator are normal or not is judged.
When monitoring data are grouped, the data which are monitored at the beginning are removed, grouping statistics is carried out after the refrigerator works stably, and the situation that the data which just start to work are unstable due to the fact that a monitoring system is arranged can be avoided.
T5, deducing the stability of the startup and shutdown conversion according to the multiple groups of startup and shutdown time ratios. Whether the on-off time ratio of the refrigerator is normal or not is deduced through a plurality of groups of detection results, and meanwhile, the working stability of the refrigerator can be judged according to the plurality of groups of on-off time ratios.
And T6, counting the starting time and the stopping time between two turning points in the set time, and respectively comparing a plurality of starting time length changes and stopping time length changes, namely comparing the starting time length and the stopping time length of each time in the set acquisition time, and determining whether the starting time length and the stopping time length change in the acquisition time period, thereby determining the working stability of the refrigerator refrigeration equipment.
In addition, according to T5 and T6, the working stability of the refrigerator refrigeration equipment is detected from two dimensions, firstly, the working stability of the refrigerator refrigeration equipment in a monitoring time period is determined by comparing the change of the starting-up time length and the change of the shutdown time length in a set monitoring time period in a single way, and secondly, two adjacent starting-up time and shutdown time are used as a group, the ratio of the starting-up time to the shutdown time in the group is compared, and whether the starting-up time and the shutdown time of the refrigerator are normal is further judged.
Through the steps, the detection system can automatically store the data of each detection time point, simultaneously process the monitoring data in real time, and automatically obtain the respective time distribution conditions of starting and stopping of the refrigerator refrigeration equipment and the duty ratio conditions of starting and stopping, so that manual calculation processing is not needed, and the monitoring accuracy of starting and stopping is improved.
The temperature acquisition unit mainly used gathers refrigerator apotheca temperature in real time simultaneously, and the refrigerator apotheca of this embodiment is refrigerator walk-in, freezer and soft room of freezing respectively, detects through the temperature data to a plurality of refrigerator function rooms, enlarges the detection range of maintenance, accomplishes the detection operation of comprehensive parameter, and the concrete step that single chip processor handled temperature acquisition unit collection information includes:
s1, setting the temperature threshold of the storage chamber through the key input circuit, collecting the temperature of the storage chamber in the refrigerator by using the temperature collection unit, and storing the collected temperature parameters in real time by the single chip processor.
And S2, respectively creating a time-temperature rectangular coordinate system in the single chip processor, and correspondingly integrating the refrigerating temperature, the acquisition time and the temperature threshold value in the time-temperature rectangular coordinate system.
The time axis interval of the time-voltage rectangular coordinate system and the time-current rectangular coordinate system is generally 5 minutes, the voltage sampling unit and the current sampling unit periodically collect a voltage value (which can be 30s or 1min) once, and the collected temperature is integrated into the time-temperature rectangular coordinate system to generate a curve about the temperature change.
S3, counting the change turning points of the refrigeration temperature, collecting the time points corresponding to each change turning point, and calculating the average temperature between the two turning points.
The change of the temperature of the storage chamber is closely related to the starting and stopping states of the refrigeration equipment, when the refrigeration equipment is started, the temperature of the storage chamber is reduced, and when the refrigeration equipment is stopped, the temperature of the storage chamber is increased, so that when the refrigeration equipment is started and stopped, the temperature of the storage chamber can be correspondingly changed, a temperature inflection point appears, and the temperature inflection point is related to the working state of the refrigeration equipment.
The specific formula for calculating the average temperature between two turning points is:
where kp (i) is the voltage value or the current value detected at regular time, and n is the sampling times in the two turning point times.
The stability of the freezing temperature of the refrigerator can be determined by calculating the average temperature between a plurality of groups of two turning points in the sampling time period, and the stability of the on-off state of the refrigerator is reflected on the side surface.
And S4, comparing the time points of the temperature change turning point, the current change turning point and the voltage change turning point, and calculating whether the turning point time of the three parameters is consistent.
Generally, the time corresponding to the temperature change turning point, the current change turning point and the voltage change turning point is not completely consistent, and the storage chamber is relatively sealed, so that even if the refrigeration equipment is stopped, the current voltage is reduced to zero, but the temperature is not immediately reduced, and the temperature change is a gradual change process, so that the refrigeration efficiency of the refrigeration equipment and the sealing condition of the refrigerator can be determined according to three time point differences of the triggering point time of the temperature change, the current change turning point time and the voltage change turning point time.
When the refrigerator has poor sealing performance, the heat preservation performance of the refrigerator is low, so that when the refrigeration equipment is stopped, the turning point of temperature change is advanced compared with the normal time, the temperature reduction rate is high, and the time ratio of starting and stopping is increased.
When the refrigeration efficiency of the refrigeration equipment is low, the turning point of the temperature change is lagged compared with the normal time when the refrigeration equipment is started, the rising rate of the temperature is slow, and the time ratio of starting and stopping is increased.
Therefore, the monitoring system can help analyze the cause of the refrigerator fault by only comparing the temperature change turning point with the standard temperature change turning point, and can help the staff to determine whether the refrigerator is successfully maintained.
And S5, calculating the difference between the maximum temperature and the minimum temperature of the storage chamber and the temperature threshold respectively, and providing a parameter for adjusting the ratio of the on-off state time in an auxiliary mode.
If the difference between the maximum temperature and the minimum temperature of the storage chamber and the temperature threshold is +/-1 ℃, the normal measurement error is obtained, if the error exceeds 1 ℃, the maximum temperature and the minimum temperature of the storage chamber are both smaller than the temperature threshold, the starting-up time length is prolonged, the starting-up and shutdown time ratio is improved, and if the maximum temperature and the minimum temperature of the storage chamber are both larger than the temperature threshold, the starting-up time length is shortened, and the starting-up and shutdown time ratio is reduced.
Therefore, the monitoring system can help the staff to adjust the maintenance scheme according to the difference between the maximum temperature and the minimum temperature of the storage chamber and the temperature threshold value respectively, so that the system can not only solve the problem of the refrigerator, but also provide a reasonable maintenance scheme, and plays a role of an intelligent auxiliary tool.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A monitoring system for recording the on-off state of a refrigerator is characterized in that: comprises that
The parameter sampling unit is used for collecting working parameters of the maintained refrigerator refrigeration equipment in a starting and stopping state;
the single chip processor receives the detection data of the storage parameter sampling unit, processes the detection data and judges whether the refrigerator is in a normal working state or not;
the display circuit is used for displaying the processing result of the working parameters of the refrigerator;
the prompt tone circuit is used for prompting the parameter acquisition action during starting and stopping;
and the key input circuit is used for setting the acquisition time value of the parameter sampling unit and checking the specific result of the parameter sampling unit.
2. A monitoring system for recording an on-off state of a refrigerator according to claim 1, wherein: the parameter sampling unit comprises a voltage sampling unit for collecting the working voltage of the refrigerator refrigeration equipment, a current sampling unit for collecting the working current of the refrigerator refrigeration equipment and a temperature collecting unit for collecting the storage temperature of the refrigerator in real time.
3. The monitoring system for recording the on-off state of the refrigerator as claimed in claim 2, wherein the specific steps of the single chip processor processing the information collected by the voltage sampling unit and the current sampling unit are as follows:
setting sampling time, respectively acquiring working voltage and working current of the refrigerator refrigeration equipment in real time by using a voltage sampling unit and a current sampling unit, and storing acquired voltage and current parameters in real time by a singlechip processor;
the single chip processor processes data, respectively creates a time-voltage rectangular coordinate system and a time-current rectangular coordinate system, correspondingly integrates a working voltage value and acquisition time in the time-voltage rectangular coordinate system, and correspondingly integrates a working current value and acquisition time in the time-current rectangular coordinate system;
marking turning points in the time-voltage rectangular coordinate system and the time-current rectangular coordinate system, setting the time when the voltage value and the current value are greater than zero as a starting-up state, and setting the time when the current value is close to zero as a shutdown state;
the data of adjacent starting-up states and shutdown states are a group, and the ratio of each group of starting-up time to shutdown time in the acquisition time is calculated;
judging the stability of the refrigerator in the switching between the start and the stop according to the ratio of the accumulated start and stop;
and counting the starting state duration and the stopping state duration in the set time, and comparing the change of the starting state duration and the change of the stopping state duration.
4. The monitoring system for recording the on-off state of the refrigerator as claimed in claim 2, wherein the temperature acquisition unit is mainly used for acquiring the temperature of the storage chamber of the refrigerator in real time, and the specific steps of the single chip processor processing the information acquired by the temperature acquisition unit are as follows:
setting a temperature threshold value of the storage chamber, acquiring the temperature of the storage chamber in the refrigerator by using a temperature acquisition unit, and storing the acquired temperature parameters in real time by using a single chip processor;
respectively creating a time-temperature rectangular coordinate system in a single chip processor, and correspondingly integrating the refrigerating temperature, the acquisition time and the temperature threshold value in the time-temperature rectangular coordinate system;
counting the change turning points of the refrigeration temperature, collecting the time point corresponding to each change turning point, and calculating the average temperature between the two turning points;
comparing the time points of the temperature change turning point, the current change turning point and the voltage change turning point, and calculating whether the turning point time of the three parameters is consistent;
and calculating the difference between the maximum temperature and the minimum temperature of the storage chamber and the temperature threshold respectively, and providing a parameter for adjusting the ratio of the startup and shutdown state time in an auxiliary mode.
5. A monitoring system for recording an on-off state of a refrigerator according to claim 3, wherein: the voltage and current value of the refrigerator refrigeration equipment in the starting state is larger than zero, and the voltage and current value of the refrigerator refrigeration equipment in the stopping state is equal to zero or slightly larger than zero.
6. The monitoring system for recording the on-off state of the refrigerator as claimed in claim 4, wherein the specific formula for calculating the average temperature between the two turning points is:
where kp (i) is the temperature value detected at regular time, and n is the sampling times in the two turning point times.
7. A monitoring system for recording an on-off state of a refrigerator according to claim 4, wherein: the difference between the maximum temperature and the minimum temperature of the storage chamber and the temperature threshold value is +/-1 ℃.
8. A monitoring system for recording an on-off state of a refrigerator according to claim 4, wherein: when calculating whether the triggering time of the three parameters of the temperature change turning point, the current change turning point and the voltage change turning point is consistent, taking the time corresponding to the current change turning point as a standard value, and comparing the time of the temperature change turning point and the time corresponding to the voltage change turning point with the standard value.
9. A monitoring system for recording an on-off state of a refrigerator according to claim 2, wherein: the current sampling unit is also connected with a current amplification filter circuit, the output end of the current amplification filter circuit is connected with the input pin of the single chip processor, and the output ends of the voltage sampling unit and the temperature acquisition unit are also connected with the input pin of the single chip processor.
10. A monitoring system for recording an on-off state of a refrigerator according to claim 1, wherein: the power supply module is connected with a power pin of the single chip processor through the circuit conversion unit and also provides power for the prompt tone circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911007104.4A CN110780131A (en) | 2019-10-22 | 2019-10-22 | Monitoring system for recording start-up and shut-down states of refrigerator |
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| CN201911007104.4A CN110780131A (en) | 2019-10-22 | 2019-10-22 | Monitoring system for recording start-up and shut-down states of refrigerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314084A (en) * | 2021-05-31 | 2021-08-27 | 惠科股份有限公司 | Display panel driving method and device and display panel |
| CN114325148A (en) * | 2021-01-26 | 2022-04-12 | 青岛海尔电冰箱有限公司 | Intelligent detection equipment of refrigerator |
-
2019
- 2019-10-22 CN CN201911007104.4A patent/CN110780131A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325148A (en) * | 2021-01-26 | 2022-04-12 | 青岛海尔电冰箱有限公司 | Intelligent detection equipment of refrigerator |
| CN113314084A (en) * | 2021-05-31 | 2021-08-27 | 惠科股份有限公司 | Display panel driving method and device and display panel |
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